There's a 2 class variant with old seats which has all 6 rows in the same cabin, and a variant with new seats that has rows 1-5 in the first cabin and row 6 alone in the second cabin.

Don't worry about what seatguru says - it is often outdated or inaccurate. Row 6 is great on the 3 class. I think it is still a 2 class if you're able to book a row 5 and row 1 is available. My suggestion then is get out of row 6 as it's on its own.